Device for milking machines



Dec. za, 1939. c. wlER 2,184,761

DEVICE FOR MILKING MACHINES 'Patented Dec. 26., 1939 UNITED STATES'lPATENT OFFICE DEVICE FOR MILKING MACHINES Charlie Boyd Wiet, Pineville,La.

Application March 17, 1938, Serial No. 196,559

7Claims.

This invention relates to a safety devicev adapted to be used with anyconventional form of milkin g machine to prevent the passage of impuremilk to the milk receiving container.

More particularly it is an object of this invention to provide a deviceadapted to be mounted in the milk line and to be actuated by contactwith impuritiesin the milk to shut-oil the passage of the milk, therebypreventing contaminav tion of that part of the milk alreadyl in thecontainer, and likewise indicating the existence of disease in the cowto which the machine is attached.

It is a further aim of this invention to provide a. device containing alter and a valve, said lter adapted to permit the passage of pure milkbut to resist thepassage of impure milk, and to be actuated thereby toclose the valve to shuton the milk line.

'Other objects and advantages of the invention will hereinafter becomemore fully apparent from the following description of4 the drawing whichillustrates a preferred form of the invention, and whereinz- `Figure 1is a side elevational view of a portion of a conventional milkingmachine showing the invention attached there Figure 2 is an enlargedlongitudinal central sectional view of the device,

o Figure 3 is a cross sectional view taken lon the l1ine3-3ofFigure2,and Figure 4 is a cross sectional view on the line 4-4of Figure 2. f

Referring more particularly to the drawing wherein like referencecharacters designate like or corresponding parts throughout'thedifferent views, III designates generallya. portion of Ia milk- II tothe milk receptacle, not shown. The invention comprises a cylindricalhollow casing I5 which is 'internally threaded at each end as indicatedat Il and I1, to receive the plugs I9 and I9, respectively. providedwith the bores u and 2| communicating with the interior of (CL 21o-166)the casing I5. Plugs I9 and I9 are each provided with an internallythreaded teat 22, which communicates with the bores 20 and 2|, and whichare adapted to receive the threaded ends of the short sections of'pipe23. The adjacent 5 ends of the milk line or pipe I3, which is pref-Verablv formed of flexible tubing, -are adapted to be stretched over andinto engagement with the pipes 23 as best seen in Figure 1 to mount theattachment I4 in the milk line between the milk- 10 er ,Ili andthe milkreceiving receptacle, which is not shown. p

A filter designated` generally 24 and mounted on a rod .25, is slidablymounted in one end of the casing I5. The lter 24 comprises two 15 disks26 and thedisk 21-between which are mounted the ne wire mesh fabric 28.The disks f '29 and 21 are provided with a plurality of aligned radiallydisposed openings 29, through which the liquid passing through cylinderI5 may pass, and m the central opening 29' toreceive lthe threaded end390i the rod 25. Nuts 3i engage the threaded end 39 and the oppositeside .of the iilter 24 to hold the disks and mesh fabric in assembledposition. 'I'he disk 21 is provided vwith an annular iiange 32 adaptedto engage the wall of the casing I5 to prevent the liquid from passingaround the illter 24.

The opposite threaded end 93 of rod 25 engages v a threaded opening 34in the backface of a 30 valve 35. The opposite side of valve 35 isprovided With a cylindrical tapered portion 36 adapted to engage a valveseat 31 formed in the inner face of the plug I9-and communicating withthe v bore 2|. Valve 35 is provided with a plurality 35 of spaced ears39 to engage the wall of casing I5. to provide a guide for the valve,and to permit liquid to pass between the periphery of the valve and thewall ofthe casing. Casing I5 has an annular inwardly proiectingshoulder39, -in- 4o termediate of its ends, forming a vseat for one end of anexpansive coil spring 40, the opposite end of 4which engages the filter24 to urge it toward plug I9. sufficiently to hold portion 33 out ofengagement with'the valve seat 31 to `permit liquid to flow through thecasing II.

Gaskets 4I may be mounted between the ends of casing I 5 and the plugsI9 and I9 to provide a liquid-tight seal. From the foregoing it will beseen that when the milking machine I0 forces the milk through pipe I3,it will pass through the casing I5 which is mounted in this pipe. Themilk will enter the casing I5 through bore 20- in plug I9 and will thenlter through openings 29 and through the u mesh fabric 2t covering theseopenings, and hence through the remainder oi casina it and around thevalve t5, through bore 2i, the pipe 2t conununicating therewith, andback into the other section oi pipe i8 and hence to the milk receptacle,not shown. Coil spring do is of suiicient strength to withstand thenormal pressure of the milk to prevent it from closing valve 35, butshould the milk fromany particular cow be diseased so as to containblood clots, garnet or the like, the mesh wire fabric 2s will be too neto permit the passage of such impurities, so that the pressure `afill bebuilt up against the filter 2t to cause it to move against the action ofspring f3@ seating valve 85 in valve seat t? and shutting oi the passageof milk so that that portion already in the mill: receptacle will not becontaminated and indicating by stopping the operation of the millierthat the cow being milked is diseased.

Various modifications and changes in the construction of the nlter aswell as the operation oi the shut-off valve may obviously be made -andare contemplated, and the right is expressly reserved to malte suchchanges and modifications as do not depart from the spirit and'scope oithe invention as hereinafter defined by the cla u:

I claim as my invention:

i. A device of the class described comprising a housing having an inletand an outlet end, a valve seat formed in the outlet end of saidhousing,aJ rod slidably mounted in said housing, a sieve member forminga partition adjacent said inlet end of the housing, said sieve memberbeing carried by one end oi said rod, a valvemounted on the oppositeendof said rod and adapted to seat in said valve seat, and spring meansnormally holding said valve out of engagement with its seat to permitpassage of a liquid therethrough, said sieve member being actuated bythe pressure oi the liquid,

containing impurities, to close the valve against the action of saidspring.

2. In a sanitary attachment for milking 'machines, a cylindrical memberhaving an inlet and an outlet end and adapted to be mounted in the milkpipe, a rod slidably mounted in said cylindrical member and having afilter mounted on one end to form a partition in said cylindrical memberadjacent its inlet end through which the.

milk must pass, a valve mounted on the opposite end of said rod andadapted to seat in the outlet end of said cylindrical member to shut-othe passage of liquid therethrough, and spring means engaging saidfilter to normally hold the valve in an open position. l,

3. In a safety device for milking machines. a housing provided with aninlet and an outlet end and having a valve seat at its outlet end andadapted to be connected to a milk pine. 8. rod, a. nlter mounted on oneend of the rod and slidably 'mounted in said housing adjacent itsV inletsheaves end to form a partition through which the mills f must pass, avalve mounted on the opposite end of said rod to engage the valve seatto close the passage, and spring means normally holding said valve in anopen position to permit the passage of milk therethrough, said filterbeing adapted to be actuated by impurities of the mills to close thevalve to shut-oi! the passage of milk through the pipe.

4. In a device of the class described, a casing having an inlet and anoutlet end and adapted to be mounted in a pipe line, a rod, a ltermounted on one end of the' rod and slidably mounted in said casing andforming a partition adjacer t its inlet end, a valve mounted on theopposite. end of the rod and adapted to' close said casing at itsoutletl end, and resilient means normally holding the valve in an openposition to permit the passage of liquid through the lter and casing,said nlter being oi' suillciently nne mesh to prevent passage ofimpurities therethrough and to be actuated by the pressure of the impureliquid to move said valve into position to close the passage through thecasing.

5. In an attachment for milking machines, a cylindrical housing havingan inlet and an outlet end and adapted to be'mounted in a milk conduit,said cylindrical housing being provided with a shut-ofi valve slidablymounted therein to seat in its outlet end, a filter mounted in saidhousing adjacent its'inlet end and forming aspartition, a rodconnectingvsaid valve and lter, and spring means n holding said valve inan open position, said filter being adapted to be clogged by impuritiesin the mili: and to be thereby actuated by the pressure ofthe mili: toclose said valve. i

d: A ltering` device comprising a tubular casina having an inlet and enoutlet end, a valve slidably mounted in said casing to seat in and closeits outlet end, Ia piston mounted in said casing adjacent its inlet endand provided with a plurality of screen covered openings formingpassages for a liquid, a rod connecting said piston and valve, andyieldable means normally retainina said valve in an open position, saidscreen covered openings being adapted to resist the passage oiimpurities in a liquid whereby the pressure of the liquid will actuatesaid piston to move the valve to a cl tion.

7. An attachment for liquid conduits compris- .ing a tubular casingadapted to be mounted in il B. WIER.

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